[ fey-uh-lahyt, fahy-ah-lahyt ]
/ ˈfeɪ əˌlaɪt, faɪˈɑ laɪt /

noun Mineralogy.

the iron end member of the olivine group, Fe2SiO4.


Discover The Influence Of Portuguese On English Via This Quiz!
We’ve gathered some interesting words donated to English from Portuguese … as well as some that just don’t translate at all. Do you know what they mean?
Question 1 of 11
Which of the following bird names traces its immediate origin to Portuguese?

Origin of fayalite

1835–45; named after Fayal; see -ite1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for fayalite

/ (ˈfeɪəˌlaɪt, faɪˈɑːlaɪt) /


a rare brown or black mineral of the olivine group, consisting of iron silicate. Formula: Fe 2 SiO 4

Word Origin for fayalite

C19: named after Fayal
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for fayalite

[ fāə-līt′ ]

See under olivine.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.